Added: Nov 23, 2008
Author: h4ck3rm1k3
Duration: 1:13
The James M. DuPont Meteorite Collection - Gani 013 meteorite, a newly detected Rumurutiite, have been analysed. The petrographic description of this chondritic breccia is given by Jackel et al. [3]. Olivines in equilibrated clasts of Dar al Gani 013 have uniform FeO and NiO contents. Olivines in unequilibrated clasts are zoned with FeO increasing from core (33.23 wt%) to rim (35.86 wt%) and Ni decreasing from 0.25 wt% in the core to 0.11 wt% in the rim. With increasing oxidation, both FeO and NiO should become enriched in olivine coexisting with a metal phase. Alternatively, variation in Ni content of olivines may be related to silicate-sulfide equilibria. However, the facts that (1) there is a distinction in the pattern of Ni-distribution in olivines from equilibrated (unzoned)
Channel: Education
Tags: carbonaceous cyanobacteria fossils life meteorite
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